package chapter4.Example15_17;

public class Example17 {
    public static void main(String[] args) {
        Animal a1 = new Dog();
        System.out.println("动物类 a1= new Dog() :" + (a1 instanceof Animal) );
        System.out.println("动物类 a1= new Dog() :" + (a1 instanceof Dog) );
        Animal a2 = new Animal();
        System.out.println("动物类 a2= new Animal() :" + (a2 instanceof Animal) );
        System.out.println("动物类 a2= new Animal() :" + (a2 instanceof Dog) );
    }
}
